code: def _testRoll(self, np_input, shift, axis):
      expected_roll = np.roll(np_input, shift, axis)
      with self.cached_session():
          roll = manip_ops.roll(np_input, shift, axis)
          self.assertAllEqual(roll, expected_roll)
  
imports: import numpy
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors_impl
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import gradient_checker
  from tensorflow.python.ops import manip_ops
  from tensorflow.python.platform import test
label_desc: Use image node_id 1 for calling the RollTest obj's underlying member method code with example usage: obj._testRoll(np_input, shift, axis) without return types